advancedTransactions — @Transactional, Propagation & Isolation
What is the self-invocation trap with @Transactional, and why does it happen?
Calling an @Transactional method from another method within the SAME class bypasses Spring's AOP proxy entirely — it becomes a direct Java method call rather than going through the proxy that actually starts the transaction. The transactional behavior is silently skipped because the proxy, which is what intercepts external calls to the bean, was never invoked.
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